1974

6.5

2006

7.0

1951

5.1

2017

6.9

1999

8.0

2021

7.2

1978

6.8

2013

6.1

2002

7.5

1958

7.1

2017

6.5

2009

7.2

1999

7.6

2019

6.4

2016

6.5

2014

6.7

2002

7.5

1936

7.4

1986

6.3

2013

6.5